34 



in chains along the veins of the underside of the leaves. These soon hatch and the 

 young larvae feed on the foliage^ often being most numerous in the central parts 

 of the plants, and doing much damage there before attacking the outer leaves. The 

 foliage in many a plantation is almost entirely destroyed, only the main veins and 

 the fruits being left. There are two broods in a year, the larvae of the second 

 appearing about the time the currants are ripening. When the larvae are full 

 grown they enter the ground and make earthen cocoons. The winter is spent in 

 there. 



Means of Control. — Fortunately this pest is easily controlled by spraying with 

 arsenicals. The first application should be with 2 pounds of Arsenate of lead to 

 40 gallons of diluted lime-sulphur, or of Bordeaux mixture applied Just before the 





I 6 \ 



Fig 20. — Imported Currant Worm: (a) Female and male 

 adults enlarged (the lines to the left show the natural size); 

 (&) larvae, those to the left immature, the others about mature; 

 (c) pupa enlarged; id) cocoon formed in the soil; (e) eggs 

 laid on under surface of leaf. (After Lugger.) 



blossoms appear and repeated soon after the fruit is set. See to it that all the inner 

 and lower leaves are covered. The lime-sulphur or Bordeaux is added to control 

 diseases. If the second brood is seen to be present, hellebore, 1 ounce to 1 gallon of 

 water, should at once be used. The hellebore should be fresh, as it loses strength 

 if exposed to the air. It is unsafe to use arsenicals on the fruit at this stage. 



Tpie Imported Currant Borer {Aegeria tipuliformis) . — Most currant and, 

 to a lesser extent, gooseberry plantations are attacked by a borer which works in 

 the canes, especially in the larger ones. Affected canes not infrequently become 

 sickly and in the following season die. The borer is the white larva of a clear- 

 winged moth about half an inch in length, blackish in color with several narrow 

 yellow bands around the body. It looks somewhat like a wasp. In Ontario the 

 moths appear in June and may often be seen in considerable numbers on the leaves. 

 They lay eggs in the axils of the leaves or on any little opening on the canes' and 

 the young larvae on hatching bore into the pith where they feed till full grown. 



